Adjustable fixture



vApril 19, 1927. 1,625,069

l G. ARRAS ET AL ADJUSTABLE FIXTURE Filed Nov. 26. 1925 InvariZs. 66079@rm Patented Apr. 19, 1927.

UNITED STATES PATENT OFFICE.

ADJUSTABLE FIXTURE.

Application filed November 26, 1923.

rIhis invention relates to a fixture particularly designed and intendedfor use with elect-ric lamps and shades or reflectors The principalobject of the invention is to provide a lamp holder which can beadjusted to accommodate lamps of different sizes to the same shade, or alamp to different shades, for the purpose of producing the desired orthe best illuminating effects. The principal object of the invention isto provide an adjustable lamp holder of this kind in which the height ofthe socket can be adjusted without removing or disconnecting any portionof the shade or lixture. A still further object is to produce a lamp andfixture holder of the construction herein shown and described.

In the accompanying drawings, Fig. 1 is an elevation partly in sectionof a fixture holder constructed in accordance with the principles ofthis invention; Figs. 2 and 3 are side and end views respectively of thefixture proper; Fig. et is a section taken on the line l--et of Fig. 3;and Fig. 5 illustrates a detail of the locking means.

In applying an electric lamp to a glob-e or reflector to produce acertain light intensity or effect, it is frequently necessary to changethe size of the lamp, and as the lamps vary in length, some provisionmust be made for varying the position of the lamp with respect to thereflector or glob-e. As proposed in the present invention. thisvariation is accomplished by providing the fixture holder with anadjustable socket which is designed to position the lighting filament ofdifferent lamps at various points with respect to the reflector.

In carrying out this invention, a supporting plate or member 1 has aprojecting nipple threaded on the inside for receivinga fixture stem 3,and on the outside for receiving a lock nut 4. Atthe base of theexternally threaded portion of the nipple is a holder made by an angularshoulder 5 for receiving the correspondingly perforated upper end 6 of ashade or reflector 7 which has a tubular portion 8 adapted to sin'roundthe supporting member 1 and extending for a distance below it. `Washers6 and 6b are placed on opposite sides of the perforated portion 6 of thereflector and are held in place against the upper side of the supportingmember 1 by means of a plat-e 4: which is engaged by the locking washer4. j

In the tubular portion 8 of the reflector is serial No. 676,893.

housed the lamp supporting means which comprises a pair of rods t)projecting at the opposite sides of the plate or support 1 and havingnotches or annular grooves 10 at spaced intervals, with inclined edgesl0 leading therefrom. l

A socket member 11 has lateral extensions 12 with perforations 13 forreceiving rods 9, and adjacent thereto are perforations 1st in whichbolts or screws 15 are loosely inserted from the underside thereof. Atthe upper end of each screw is a locking member 1G preferably formedwith a metal bend in the general shape of a Z. one otl which isperforated and held .in place at the end of each screw 15 by means of anut 17 which presses the member against the face of the projection 1:2.The other end is formed with a notch 1S which is adapted to engage anyone of the notches or grooves of the adjacent rod 9, thus providing aseparate locking member for each of the rods.

lVithin the socket member is a shell contact 19 and a center contact 20connected through the socket member in ya well known manner withcorresponding contact terminals 21 and 22. A lamp is inserted in thesocket member and makes electrical connection in a well known manner,the conductor wires being omitted for clearness, it being obvious thatsufficient space is left between the socket member 11 and the support 1for allowinO' such conductors to be looped and connected in the ordinarymanner.

In adjusting this holder the screws 15 are loosened so that the lockingmember 16 can be moved out of engagement with the notches or grooves 10,as shown in 5, and for this purpose the notches are preferably formedwith rounded or inclined rather than angular' edges so that the lockingmembers can be easily moved out of engagement therewith. The naturalposition of the socket will tend to engage the locking members in thenotches as the socket is moved along the rods 9 and when the properposition is reached the screws 15 can be tightened, positively lockingthe socket member in place. Vith this construction it is obvious thatthe socket member can be moved or adjusted with respect to the shade orreflector for obtaining different lighting effects with the same lamp,or for positioning` lamps of different sizes so that the lightingfilaments thereof will be at the same location with respect to thereflector. It is furthermore ob- 1 lla) lll vious that the same lamp mayloe used With reflectors of different sizes. ft is not necessary toremove or disengage the reflector 7 to make any desired adjustment ofthe socket holder. lt may bc necessary to remove the lamp so that accessmay be had more freely to the screws 15, but after the proper adjustmentis madethe screws may be tightened lockingthe socket member in thedesired position.

Vile claim:

l. In an adjustable fixture, a supportingr rod With spaced notches. aninsulating lamp socket having' an integral perforated projec tionthrough which the rod slides, and clampinn` means comprising' a bentresilient strip, one end of 'which is adapted to engage the notches inthe rod. and means to secure the other end of the strip to the socketand to press the first end against the rod.

2. fn a ,fixture of the class described, a notcheo supporting` rod. aninsuiatinfr lamp socket with an integral perforated portion into whichthe rod projects. a resilient strip having` a notch at one end to engagethe notches of the rod, and fasteningmeans in* cluding' a nut andscrcv.v engraa'inc` the other end for pressing' and locking the strip inengagement with the rod.

ln an adjustable fixture, a socket member with a perforated projection,a notched supporting' bar adapted to extend through the perforation, thenotches having' inclined sides, notch engaging means carried by theholder comprising` a bent resilient strip, one end of which is adaptedto engage in the notches of the rod and the other end having` aperforation, a fastening screnv extending through the projection of thesocket member recae-o and through the perforation of the strip, and anut threaded on the end of the screw and engaging the strip for binding'it firmly in engagement with the notch of the rod.

4. In an adjustable fixture, a supporting member having' a pair ofspaced rodsl projectini,Y therefrom with notches at intervals alcun),`the rods, a lamp socket With perforated projections through which therods extend, fastening' means carried by the socket for engagingy thenotches said means including' screws extending through the projections,and a shade member with a tubular portion extending' over thesupjfiorting member, the rods, and the socket, and for housing` a lan'iptherein, the lsaid adj Listing screws beine' accessible from the insideof the shade member Without displacing` it with respect to thesupporting member or the socket in adjusting' the latter.

5. In a fixture kof the class described, a supporting; plate having a{Hojee-ting' nipple with an angular shoulder at the base thereof,notched supporting' rods jn'ojectiire,` from the plate, a socket memberwith perforated projections through which the rods extend, fastening'screws extending through the projections adjacent each rod, resilientclamping; means operated by the screws for engaging' the notches of theshade, a shade Wit-h a tubular portion extending' over the supporting'plate and the socket 'with a perforation at the end to encrage theangular shouldered portion on the plate, and means for securing' thetubular perforated end of the shade at the top of the plate.

GEORGE i-XRRAS. DYWfGI-l E. lVORRELL.

